Finding the Fourth Proportional to 12,947.98, 17,869.16 and 7,913.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,947.98 : 17,869.16 = 7,913.16 : x
2. Step 2: Convert to fraction form
   12,947.98/17,869.16 = 7,913.16/x
3. Step 3: Cross multiply
   12,947.98x = 17,869.16 × 7,913.16
4. Step 4: Simplify right side
   12,947.98x = 141,401,522.15
5. Step 5: Solve for x
   x = 141,401,522.15/12,947.98
6. Step 6: Final answer
   x = 10,920.74